Mobile communication system, management server device, base station device, and line reservation method

Abstract

A base station ( 12 A- 1 ) notifies a management server ( 16 ) of termination of an emergency call. The management server ( 16 ) specifies the location registration area of the mobile terminal with the emergency call terminated, based on the notice, and instructs base stations ( 12 A- 1 ) and ( 12 A- 2 ) belonging to the specified location registration area to hold a line to be allocated to a callback for the emergency call. Each of the base stations ( 12 A- 1 ) and ( 12 A- 2 ) holds a line to be allocated to a callback for the emergency call, based on the line hold instruction.

1 . A mobile communication system having a plurality of base station devices and a management server device for managing, based on a location registration request from a mobile terminal, a location registration area where the mobile terminal is located, wherein
 each of the base station devices comprises emergency call termination notifying means for notifying the management server device of termination of an emergency call,   the management server device comprises
 terminal location specifying means for specifying a location registration area where a mobile terminal with the emergency call terminated is located, based on a notice sent by the emergency call termination notifying means, and 
 line hold control means for instructing a base station device belonging to the location registration area specified by the terminal location specifying means to hold a line to be allocated to a callback for the emergency call, and 
   each of the base station devices further comprises line hold means for reserving a line to be allocated to a callback for the emergency call, based on a line hold instruction made by the line hold control means.   
   
   
       2 . The mobile communication system according to  claim 1 , wherein each of the base station devices further comprises terminal in-zone determination means for determining whether or not the mobile terminal with the emergency call terminated is located in its own radio zone, based on the line hold instruction made by the line hold control means, and
 the line hold means holds a line to be allocated to a callback for the emergency call when the terminal in-zone determination means determines that the mobile terminal with the emergency call terminated is located in its own radio zone.   
   
   
       3 . The mobile communication system according to  claim 1 , wherein, in response to a location registration request from the mobile terminal with the emergency call terminated, the line hold control means instructs a base station device belonging to a new location registration area where the mobile terminal is located to hold a line to be allocated to a callback for the emergency call. 
   
   
       4 . The mobile communication system according to  claim 3 , wherein the line hold control means further instructs a base station device having held a line to be allocated to a callback for the emergency call since before the location registration request is made to release the line held. 
   
   
       5 . The mobile communication system according to  claim 1 , wherein the line hold control means instructs, after elapse of a predetermined period of time after the emergency call termination notifying means sends the notice, a base station device which is reserving a line to be allocated to a callback for the emergency call to release the line held. 
   
   
       6 . A management server device communicably connected to a plurality of respective base station devices, for managing, based on a location registration request from a mobile terminal, a location registration area where the mobile terminal is located, comprising:
 terminal location specifying means for specifying, based on a termination notice of an emergency call, sent from each of the base station devices, a location registration area where a mobile terminal with the emergency call terminated is located; and   line hold control means for instructing a base station device belonging to the location registration area specified by the terminal location specifying means to hold a line to be allocated to a callback for the emergency call.   
   
   
       7 . A base station device communicably connected to a management server device for managing, based on a location registration request from a mobile terminal, a location registration area where the mobile terminal is located, comprising
 emergency call termination notifying means for notifying the management server device of termination of an emergency call; and   line hold means for reserving a line to be allocated to a callback for the emergency call, based on a line hold instruction from the management server device.   
   
   
       8 . A line hold method for reserving, when an emergency call from a mobile terminal is terminated, a line to be allocated to a callback for the emergency call, comprising:
 a terminal location specifying step of specifying a location registration area where a mobile terminal with the emergency call terminated is located; and   a line hold instruction step of instructing a base station device belonging to the location registration area specified at the terminal location specifying step to hold a line to be allocated to a callback for the emergency call.   
   
   
       9 . The mobile communication system according to  claim 2 , wherein, in response to a location registration request from the mobile terminal with the emergency call terminated, the line hold control means instructs a base station device belonging to a new location registration area where the mobile terminal is located to hold a line to be allocated to a callback for the emergency call. 
   
   
       10 . The mobile communication system according to  claim 2 , wherein the line hold control means instructs, after elapse of a predetermined period of time after the emergency call termination notifying means sends the notice, a base station device which is reserving a line to be allocated to a callback for the emergency call to release the line held.